Magnetic Fidget Ball
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Knurled magnetic fidget ball. Snap halves together, or twist to feel them repel! Available in 55mm & 45mm sizes.
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Other Toys & Games
- Licencja
- Creative Commons — Attribution — Noncommercial
The Ultimate Desk Toy I designed this magnetic fidget ball to be the perfect combination of tactile feedback and magnetic satisfaction. The exterior features a classic diamond knurl inlay pattern, providing a great grip and a great feel in the hand.
The magic happens inside. The ball is printed in two halves, with neodymium magnets embedded mid-print. By arranging the magnets in a specific alternating polarity pattern, the two halves of the ball will attract and lock together seamlessly. However, if you rotate one of the halves slightly, the polarities will clash, creating a really fun, springy "repel" effect!
Variations Included:
Large: 55 mm diameter
Small: 45 mm diameter
Hardware Required:
12x Neodymium Magnets - 6mm x 3mm (6 magnets are required for each half of the ball).
A drop of CA glue (Super Glue).
Magnet Layout (IMPORTANT): To get the satisfying attract/repel action, you must alternate the polarities of the magnets (North-South-North-South) as you place them into the slots. 👉 Please refer to the magnet layout diagram in the image gallery before inserting your magnets!
Printing & Assembly Instructions: The magnets are designed to be completely hidden inside the print.
Bed Surface & First Layer Tips (Smooth vs. Textured PEI): The bottom layer of each printed half becomes the "mating surface"—the flat faces that touch and slide against each other when the ball is assembled.
Smooth PEI Recommended: A PEI (Polyetherimide) sheet is a standard printer bed surface known for excellent adhesion. Printing on a smooth PEI sheet is highly recommended because it gives the first layer a perfectly flat, glass-like finish. This allows the two halves to glide against each other effortlessly.
Textured PEI Workaround: A textured PEI sheet leaves a stippled, bumpy finish on the plastic. If both halves are bumpy, they will grind against each other, and the tiny gap created by the bumps will noticeably weaken the magnetic pull. If you only own a textured plate, I recommend sanding it smooth with sandpaper.
I have provided pre-sliced G-code files that already include a built-in pause at the exact layer needed to drop in the magnets.
If you are slicing the STL files yourself, be sure to add a "Pause at Height" (M600) command right before the printer bridges over the magnet holes.
🚨 PRO-TIP (Don't skip this!): When the printer pauses, place a tiny drop of super glue into each hole before dropping the magnet in. Neodymium magnets are very strong and will easily jump out of their holes and stick to your printer's metal extruder/nozzle when the print resumes. The glue keeps them safely seated!
Resume the print and let the printer seal the magnets permanently inside.
I fully modeled everything with my human brain and hands in Alibre Atom 3D.
No supports or brim needed